FEATURES OF MEASURING THE CAMSHAFT OF INTERNAL COMBUSTION ENGINES

This article discusses the issues of assessing the technical condition of the camshaft, internal combustion engine. The necessary parameters for assessing the technical condition of the engine camshaft have been determined. How and how to measure and calculate this or that parameter is presented in detail. Methods for calculating the parameters are presented. A scheme and method for measuring neck wear, determining the height of the cam, determining the beating of the central journal of the camshaft are proposed. The main defects of the camshafts are presented. The issues of the influence of these parameters on the operability of the camshaft and the internal combustion engine as a whole are considered.

APPROACHES FOR THE DEVELOPMENT OF FOR AUTOMATED DESIGN AND SIMULATION OF ONBOARD NETWORKS

The article presents an analysis of the development prospects for the aerospace industry in relation to on-board systems and new-generation networks. It also presents the approaches for developing the SANDS software, intended for computer-aided design and simulation of on-board networks. Various approaches are described that will allow the existing software product to be refined and updated to meet new industry demands.

APPLICATION OF THE HOLT-WINTERS METHOD FOR FORECASTION HOSPITAL ADMISSIONS IN CITIES

The current situation of coronavirus infection necessitates the use of models and prediction methods for decision- making in a rapidly changing situation in large cities and towns. Due to the dynamics of the processes, it is necessary to use different models and forecasting methods for the development of the situation. The city of St. Petersburg is the object of study and an analysis of hospitalisation of patients is performed. St. Petersburg was chosen as the subject of the research. The presented research was carried out within the framework of the work "Mathematical modelling of logistic systems in medicine" during the performance of diploma projects on the assignment of St. Petersburg executive authorities in 2021. In the course of the study analytical data are collected, the city districts where the situation with transportation of patients to medical organizations is likely to be difficult to predict are identified, and the methodology of forecasting hospitalization of patients by ambulance cars is considered. In solving the problem of predicting the situation, forecasting methods in the class of polynomial models are used and the effectiveness of using the Holt-Winters method is justified.

SYNTHESIS OF THE FLEET MANAGEMENT SYSTEM SMALL SHIPPING COMPANY

Within the framework of the methodological support being developed for the planning and management of the fleet of a small shipping company, the task of synthesizing a management system has been solved. The structure and parameters of the system are determined based on the specified requirements for the conditions of its operation, as well as ways to ensure the goals of the functioning of the fleet management system of a small shipping company. The concept of a small, medium or large shipping company is defined by the number of vessels under operational management. It is noted that due to the variability of the economic situation in the transportation market in modern market conditions, permanent "rigid" connections between the elements of the transport system are not formed and the problem of coordinating the work of these elements exists only at the level of operational planning and regulation for small shipping companies. Therefore, it is necessary and sufficient to limit the system under study to the framework of flight planning. The fleet management system at this level in trump shipping traditionally consists of two consecutive subprocesses: the formation of vessel traffic patterns and the assignment of specific vessels to these schemes. The main result of the study is that a new management system structure was formed on the basis of a system analysis of processes in the conditions of working with a small fleet and identified addition-al tasks and requirements for the system. Distinctive features of the new structure from the prototype: the process of arranging transport vessels has been replaced by the process of determining the optimal composition of the leased fleet; two auxiliary subprocesses have been added to manage additional operations if necessary to unload cargo on an unequipped shore.

ALL-OPTICAL ON-BOARD NETWORKS PROTOCOLS

The article presents the concept of all-optical on-board networks (AOON). AOON protocol stack is described, the operation of the transport layer, data link layer and the management layer of the AOON protocol stack is considered in details. The article also describes a software model designed to check the correctness of operation of the AOON protocol stack from a functional point of view, and an example of the developed software model is provided.

RESEARCH OF WAYS TO DEVELOP ACCURATE DIGITAL MODELS FOR OBJECTS AND NODES OF TRANSPORT INFRASTRUCTURE

The article solves the problem of finding a solution for building a digital model of the transport network or transport infrastructure object. On the basis of the analysis, the limitation of available solutions is given and the limited state of implementation of digital models in new modernizations of transport systems is fixed. The paper provides a general scheme of using documentation of the state of the transport system, nodes and elements and considers examples based on real transport systems. The paper examines the basic requirements for digital transport models and proposes a solution based on the use of unmanned aircraft systems. A model of formation of flight task variants is proposed and, as a proof of relevance of the research, the results of a real experiment are given. The task of modernizing a segment of the transport network of the city, the identification of the state of the site on the basis of data from unmanned aircraft system is considered. The article presents a solution to the problem, which has a high quality of building a digital model and the possibility of integration into other information systems for monitoring the condition and forecasting of development.

CALCULATION OF THE REQUIRED NUMBER OF CONTAINERS AND VEHICLES FOR THE TRANSPORTATION OF A BATCH OF ACETONE

This article discusses the issues of determining the types of packaging and calculating its required quantity, taking into account the maximum use of the carrying capacity and cargo capacity of vehicles when transporting a batch of acetone from St. Petersburg to Kaliningrad.

STUDY OF THE LEGISLATIVE FRAMEWORK FOR USING UAVs

The article discusses the main provisions of the legislation on registration and rules for the use of unmanned aerial vehicles in the Russian Federation. The principles of establishing modes of use of the airspace are described, the state divisions that regulate the use of unmanned aerial vehicles in the country are noted.

DEVELOPMENT OF A MODEL FOR OPTIMIZING MUNICIPAL SOLID WASTE STREAMS AT THE ROUTE LEVEL

All over the world, a huge amount of waste is generated every minute. The organization of an effective waste management system is very topical. The economic efficiency and costs of the users of the system depend on a properly organized system of accumulation, transportation, processing or disposal. The article discusses the process of working with waste in the cities of Russia. The technique and methods of working with waste in large cities at the first stage of removal are described. The problem of optimization of the territorial scheme for the disposal of solid municipal waste has been formulated. The technological process of operation of the first leg garbage truck on the route is described and considered. The criteria and factors influencing the choice of the optimal route are formulated. The necessary initial data for calculating the optimal scheme of waste gravitation are described. The function of total route costs has been built.

UNIFIED METHOD OF ADAPTIVE-ROBUST REDUCTION OF UNCERTAINTIES IN THE ELIMINATION OF BLIND SPOTS AND RANGING OF AIR OBJECTS IN PULSE-DOPPLER RADARS

A unified method of disclosing blind ranges, reducing or eliminating measurement ambiguity has been proposed and investigated, which allows, within the framework of a typical long-range detection session of an air object by a pulse-Doppler radar, to reduce time costs, expand information content, and unify algorithmic support of a detection session. At the heart of: unified adaptive-robust procedures for controlling radiation parameters (guaranteeing the observability of an object) and processing ambiguous quasi-measurements of range (in absence of detection) and real measurement (in initial detection).